Earth in uncharted waters as climate records tumble

A series of climate records on temperature, ocean heat, and Antarctic sea ice have alarmed some scientists who say their speed and timing is "unprecedented", reports.

Dangerous heatwaves sweeping Europe could break further records, according to the UN.

It is hard to immediately link these events to climate change because weather - and the Earth's oceans - are so complex.

Studies are under way, but scientists already fear some worst-case scenarios are unfolding.

"I'm not aware of a similar period when all parts of the climate system were in record-breaking or abnormal territory," Thomas Smith, an environmental geographer at London School of Economics, says.

"The Earth is in uncharted territory" now due to global warming from burning fossil fuels, as well as heat from the first El Niño - a warming natural weather system - since 2018, says Imperial College London climate science lecturer Dr Paulo Ceppi.

Here are four climate records broken so far this summer - and what they mean.

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